All personnel were on high alert, and they were relieved until the secret door was completely closed.

  This square room with a side length of about ten meters had one wall completely destroyed due to the activities of a large number of giant rats.

  The soil behind the wall collapsed, forming a small mound that occupied half of the room, and even buried half of the adjacent wall.

  Only the wall opposite the small mound remained in good condition. After a preliminary inspection, Hugo motioned for everyone to enter.

  Given that the room had been severely damaged, even if there were traps or mechanisms, they were most likely ineffective.

  The well-preserved wall was also decorated with gorgeous reliefs, depicting a majestic red dragon.

  Although it was not colored, people familiar with the dragon clan could still easily identify its species based on the characteristics of the dragon head.

  However, the mercenaries were obviously not among them, and Jia Lan doubted their knowledge of the dragon clan.

  Everyone just glanced at the red dragon on the relief and began to search this slightly abnormal room.

  According to architectural principles, the passage in the due north direction usually leads to important areas.

  In addition, the previously speculated circular hall may be the center of the area, so it is impossible for such a location to hide only one secret room.

  However, the experienced thieves Hugo and Old Jimmy explored the obvious stone door covered with red dragon relief for a long time, but found neither traps nor opening mechanisms.

  This put the two thieves in a dilemma - no matter how superb the lock-picking skills are, there must be a lock to open.

  Seeing the sweat beads on the foreheads of the two thieves, Jia Lan couldn't help but remind them: "This seems to be a secret door, that is, a magic door!"

  After wearing the invisible "Laian Mask", Jia Lan's eyes strengthened the effect of the "Laian Eye", not only having "lightless vision" beyond "dark vision", but also being able to see things clearly in absolute darkness as if bathing in the Laian moonlight, and being able to penetrate any hidden objects within ten meters, ignoring the hazy, invisible, and stealth effects.

  Therefore, in fact, the secret door was first discovered by him, not the two thieves.

  But in order to keep a low profile, Jia Lan waited for professionals to handle it.

  He didn't speak up until the two thieves were helpless with the stone door without a keyhole.

  The two thieves breathed a sigh of relief when they learned that it was a "magic door".

  Every profession has its own expertise. If something related to magic cannot be opened, it does not damage their image as "lock-picking professionals".

  The two hurriedly gave way and let Jia Lan, a "magic professional", handle it.

  Jia Lan carefully examined the stone door relief, risked his fingers into the slightly opened mouth of the relief dragon head, and touched a tiny and slightly concave secret magic circle.

  He tapped the raised red dragon head with the magic wand in his hand, shook his head regretfully and said: "Unless we find a special "key", we can only use violent means to enter..."

  Violent means? The mercenaries looked at each other.

  Such a heavy stone door, even the great swordsman Kenmet, the leader, could hardly destroy the granite layer of more than one foot thick with a two-handed sword in a short time.

  What Jia Lan didn't tell them was that this stone door had been reinforced with secret magic, so it would be difficult to break it open with violence, let alone a foot thick, even if it was only an inch thick.

  The reason why he seemed regretful was that if he had the realm of a "mid-level wizard", he could easily open this "secret door" by releasing a 2nd-level transformation spell "knocking".

  But now they had to find the special secret door key.

  This narrative has been purloined without the author's approval. Report any appearances on Amazon.

  Everyone was at a loss, and Captain Kenmet frowned and said, "Why don't we try to open the other three secret doors?"

  In previous ruins explorations, they had also encountered special doors that even the gold-level thieves known as "locksmiths" could not open.

  In this situation, usually you can only take a detour, or simply "break it open violently" as Jia Lan said.

  Jia Lan thought for a while and said, "Maybe we should look for the key to the secret door nearby? Maybe there are clues on those golden skeletons just now?"

  "Are you referring to these gold coins?" Hugo innocently took out a handful of ancient gold and silver coins from his pocket. "I found them where those gold-level skeletons were..."

  As Hugo said this, he suddenly found that his captain was staring at him, and he couldn't help laughing and said, "Hey! Boss, I don't plan to hide it. Isn't it just putting it away first and dividing the spoils when I go home!"

  It turned out that he had secretly looted the spoils without knowing when.

  Jia Lan took the ancient coins and identified them one by one, looked at the embossed dragon head, shook his head, and returned the ancient coins to Hugo.

  Although there is a saying that dragons love gold coins, Jia Lan doesn't think that putting gold coins in the dragon's mouth will make it take the initiative to open this secret door.

  There was no mystical fluctuation on those ancient coins, and the shape and size of the coins did not match the small concave mystical array in the dragon's mouth.

  Jia Lan's eyes inadvertently swept across the bronze spear on the shoulder of a silver swordsman, which was given to him by Hugo because he was searching for traps.

  His eyes suddenly lit up and said, "Show me the spear!"

  Spears are usually used by soldiers in the army, while adventurers and mercenaries rarely choose this long weapon.

  In this relatively narrow underground temple building, those who use spears are most likely guards on duty at the temple.

  In addition, Hugo just opened the secret door with a bronze spear, and Jia Lan suspected that the four golden skeletons outside were probably the guards of the four secret doors in the east, south, west and north of the circular hall when they were alive!

  Although a little surprised, the silver swordsman immediately handed the bronze spear to Jia Lan.

  This weapon is quite heavy to hold. It is made of bronze, and the spearhead and the spear body are engraved with very exquisite patterns.

  Especially the still sharp spearhead, the complex patterns on it make it look not like a weapon, but a decoration that is more intimidating and symbolic than practical.

  Jia Lan knocked on the bronze spear. It was indeed solid. It was not until he felt the end of the spear that he found that the end of the spear was inlaid with a copper ball with complex patterns!

  After twisting it hard, the copper ball was embedded on it without moving. The copper rust had completely rusted it on it.

  However, this did not bother Jia Lan. He threw a "repair spell" on it, not only removing the copper rust on the copper ball, but also making the whole bronze spear shiny.

  This magical scene made the mercenaries open their eyes wide. If they also knew this repair spell, they would not have to worry about the maintenance of the equipment and spend a lot of effort on maintenance.

  Gently unscrewing the copper ball at the end of the spear, Jia Lan measured it on the embossed dragon head and found that the size was exactly the same as the dragon's grinning mouth.

  After the copper ball was stuffed in, a rolling sound was heard. The copper ball rolled along the root of the dragon's tongue to the tip of the tongue, making a wedge-joining sound of "knock"!

  A glimmer of light flashed, and the dragon head seemed to come alive. Suddenly, a strange language with a lot of breath sound came out of the dragon's mouth!

  Everyone was startled by the dragon head that suddenly spoke, and they all raised their weapons and aimed at it.

  Old Jimmy, who had been standing next to Jia Lan, asked curiously: "It actually makes a sound? What language is this?"

  "Don't be nervous. This is just an ancient magical method of storing sounds..." Jia Lan nodded. "This is dragon language. It says, 'What is too heavy to lift? What is too light to exist? What makes everything become nothing? What is the most gentle? What is the most brutal?' This is a riddle. You can guess it yourself..."

  The mercenaries were collectively dumbfounded, but Jia Lan didn't tell them the answer, but directly read out a dragon language.

  A rumbling sound was heard, and the ground under everyone's feet began to shake violently, so that the earth slope began to roll down a lot of mud and gravel.

  Under the surprised eyes of everyone, the whole wall split from the middle and retreated to both sides, leaving only a stone tablet as tall as a person, which happened to be the red dragon relief that everyone thought was the stone door!

  This situation made Hugo and Old Jimmy look at each other in confusion.

  And Jia Lan stretched out his palm in front of the dragon head relief, and the copper ball was spit out by the dragon head again and rolled into Jia Lan's open palm.

  "Let's go, this magic door will only be open for one minute." Jia Lan said, and took the lead in stepping into the long passage behind the secret door, and everyone hurriedly followed.

  This is a very long passage, and it seems that because it has been closed for too long, the air quality is quite bad.

  The ground was filled with dust that was enough to cover the soles of the feet. Every time he stepped on it, it was like stepping on a bag of flour and bursting a cloud of gray.

  As a last resort, Jia Lan injected water elements into the magic model on the magic wand, releasing "bubble spells" one by one, covering everyone's heads to prevent them from inhaling dust, but he didn't care about their bodies.

  This long and winding passage has a downward staircase every few meters, with a drop of about ten meters.

  When Jia Lan and his team carefully walked to the end, they had almost gone nearly a hundred meters underground.

  The only thing to be thankful for was that there were many pedal mechanisms on this passage, but they were all scrapped due to disrepair.

  The hidden arrow holes on the wall could only spray out puffs of dust, but no arrows could be shot out.

  Until the end of the passage, there was another stone door.

  This time, there were no more riddles. Hugo easily broke the two broken mechanisms above and opened the stone door.

  A broad and magnificent palace appeared before them...